Portion of a shoe



FIG. 1 is a rear perspective view of a portion of a shoe showing our new design;

FIG. 2 is a side view thereof;

FIG. 3 is a rear view thereof; and,

FIG. 4 is a top view thereof.

The broken line showing within the shaded area forms a part of the claimed design. The broken line showing immediately adjacent to the shaded area represents an unclaimed boundary of the design. The broken line showing of the remainder of the shoe is for illustrative purposes only and forms no part of the claimed design. 

The ornamental design for a portion of a shoe, as shown and described. 